Railway car truck



Sept 14, 143, v ENDSLEY 2,329,257

RAILWAY CAR TRUCK Filed March 3, 1942 3 Sheets-Sheet 1 Sept. 14, 1943. L. E. ENDSLEY RAILWAY CAR TRUCK Filed March 1s', 'v1942 3 Sheets-Sheet 2 Sept. 14,1943. L. E.IEND.SLEY 2,329,257

RAILWAY CAR TRUCK Filed March 13, 1942 3 Shees-$heet 3 LouisEi'Endsley, littsl iirghfPal,'assignor'tbjiihe Frost Railway SupplyCompany,Detroit, Mich,

Patented Sept. 14, 1943 a corporation of Michigan '1 ,Application March, is, 19512,Serial.No. 434,613J

6 Claimsii Cl. (10" v 1 4 .My invention relates to railroad "car trucks'and is herein shown and described as applied to that type ofcar truck whereinthere are separatelyiformed and independently-movable .side'frames which aremaintained in assembled'relation by;

the truck bolster.

Usually the side frames of car trucks are each providedwith a pair of columns that connect the compression and the tension elements "of the side frame and are spaced apart'longitudinally of the frame, with the ends of the truck bolster disposed between these columns, in the mid-portions of the side frame, there being springs interposed between the underside of the bolster and the tension elements of the side frames. v a In these priorstructures, the guide surfaces 0 tions laterally of the truck frame, with conse-j encounters curves inthe track. xi

Stillianother object. of army invention is to proframe. relativeto one'ianothensas when the truck vide a, truck structure whereinthe side frame the .columns'are of narrow dimension in direcquent binding'and strains as between'the col- 1 umns and the sides of the bolster, especially when h the truck wheels encounter-curves in the track rails. Also, the small areas of rubbing surface on I the sides of the columns and bolster enlargements produce excessive wear because of the high pressures per square inch. Furthermore, the distribiition of forces imposed onthe tr'uck frames by the loads on the bolster, are such that the truck frame has to be made heavy in order to withstand the compression and tension forces pro;

duced in the side frame truss, due to the secondary or bending stressest-hat at certain points add to the truss stresses.

One object of my invention is to provide a car truck frame of such, form that much wider:bol,- ster-guiding and thrust surfaces are'provided,;.in directions transversely of each truck frame, than is possible with truckiframes-of the type heretofore employed, and without interference with thebrackets for-the brake hangers, whereby wear between the rubbing or thrust surfaces of. the bolster and the side frame columns respectively is reduced, and so thatthereisincreased leverage columns or guides "and the :b olster are so arranged that: a' truck frame of. given strength "and size will better withstand the compression and tension forces producedin th'e Sideframe trussias a result'toftthesecondary or bending stresses,'fand thereby? at certain'pointsreduce the maximum stress. :fi

' i 'A.1further'. object issto provide for agwider or more extendedspring seating area on the truck frame, .which is desirable becauseithas been found that truckswithgreater spring travelthah thatrrecognized:as gstandard produce a better 'ridin'g car, :at 'highaispee'ds. I secure: this greater travel byhaving aa-greater'number of springs of lighter cros'ssection; 11-; f Another object is'ztotransmit some of the bolster lo'adrbyiong'leaf springs to points near the journaliboxesethus relievingthe center portion of; thelasidetframe of a substantial part 1 of the load, the deaf springs also acting -a' vsnubbers or friction springs tori reduce vertical vibration. of

the bolster'onthe side frames. q I Som'egof; the forms: which. my invention may take are show'nJin the accompanying drawings wherein Figural. is a plan View of a truck frame;

Fig2 is a side view thereof ;v Fig. 3 is a sectional view taken on'the line III-JIII of Fig; 2,'Fi'g; 4

is. a plan View of .the' springseating plate of the other. figures; Fig- 5 is anredge view thereof; Fig. 6 is akpersp'ective view showing the guide blockof the.othenfiguresyFigs. 7, 8, 9, 10 and l-l'are views correspondingto views '1 to 5:,respectively'but as between these surfaces, which will reduce the total force required to produce the required slip: ping of the wheels on the track rails when curves are encountered that are of such short radius that thevusual coning of the wheel treads at theivicinitycf their flanges is insufficient to compensate forthetdifference in length of the rails at track curvatures. I 7

an extended area of cooperating guideandthrust ,Another 'objectofmy invention is to provide 7 surfaces that extend. in directions. transversely of the truck side frames, so that there can be less out-.of-line displacement of the bolster anditruck end views, respectivelmof the form showingamodified form of truckj'Figs. 12, 13 and 14 are :plan;v sideand end views respectively of the guide block of Figs. 7 to 9; Figs. 15, 16, 1'7; 18 and'19..are viewscorresponding to'Figs. I to 5 respectively, but showing still another modification; and Figs. 20, 21 and 22are plan, sideand of guideblock employedin Figsrl5torl7e I Referring Lfirst :to..Figs.. 1' to I 6, theatruck 'is shown as provided with-the usual wheels 2 and side frames 3:having journal boxes 4 formed thereon, the side frameshowever, being in this instance of an improved form as hereinafter explained; jTheifside' fr ames are of identical form, and description of one "willapply to both. T

The compression element 6 of each'sideframe hasconnection with the tension element 1 thereof: through-a guide column that-"i composed of inwardly and outwardly bowedjelement 8 and 9 respectively, that are integrally formed with the compression member 6, at their upper ends, and at their lower ends are integrally formed with a web in and with the tension member I. The web I serves also as a support for a spring seating plate H upon which springs I2 and a spring I3 are mounted. There are six springs. l2 and a.singIecentralsDring-IS. The springs 12 may be of *any conventional form but in this instance the centrally-located spring I3 is of the friction type, and may suitably be of the form shown in my Patent 2,095,545. all serve to carry the bolster load in'th'e 'usua1 manner. Additional friction springs can be substituted for some of the springs 12,. it"belng desirable that they be distributed in a balanced-l arrangement.

These springs Another advantage of the extended bearing areas is that there is space and provision for a larger spring seating area, and consequently for a larger number of springs of slightly larger diameter. Therefore the springs may individually be weaker and allow for as much as three inches vertical bolster movement, which is greater cushioningtravel than can .be had where a fewer n'umberofnecessarilystiffer springs is employed as must be the case in trucks having lim- -ited dimensions for accommodation of springs.

The truck bolster I5 is bifurcated at its ends to form arms 16. These arms extend acrossthe front and rear sides of the column 'eIe'mentsB and 9 andres't upon the-springs 12, which thereby carry the bolster load. The column ,a,nd.9 serve .as verticalgui-des for the-ibolsteriias. it moves upanddowninservicesend prevent relative displacement of the boister'and: the truck frame in.rlirectionslongitudinally or thetruck frame.

Ablock i8 .is disposed betweenz-theaiarms it of. the bolster, and between. the column elements 8 and! and is connected thereto;by bolts.

and IS. The ends of the block l8 are inopposed relation toz'the columnelementsrii: and 9 and thus prevent relative disp1acer'nent.:'of x-th'e bolsterand side framei'n directions laterally of the frame. (Wrestsupon the central1spring-1-3 tottransmit bolster loads thereto. Slight. clearance will be provided between the bolster arms lfiansdthe columns 8--9, and also between th'ecen'dslofzthe block l8 .and the columns'sfl'iaind 19.. The. bolt Isa serves also as .a ti :boltiforxthe outenends Also the midportion of the jiblock of the bolster arms and-strengthens them, since stresses which tend. t-otbendl these :arms forwardly and'rearwardly: relative to one :another are reduced or counteracted :by the bolt: It will thus be seenithatvthe el'ementsifioan 9. being widely spaced, provide for?longtransverse thrust areas, and without interference by the brake hanger brackets 21.. here .is thus not only reduced-wearlbetween the :bolst'er and the" columnsgbut there is such leverage that there is less total strain. imposed onxthen'columns when the usual. slipping: :of the TWhBElS occurs on sharp or medium cnrves, thanx inzthose. structures wherein thecolumnareais. of n arrow width.

Als'mthe rubbing surface :at 8 and'lareisuch umn '8-and Brand theeweb 116 which tend bend the midportioni of; the side; frame hown wardly and to place theupper'edgeb'f that-en sion member I under compressiom are -.equali'zed by the pull on "the tension memberxl, which tends to zplace said .member under tension at approximately theipoints- B: and.v under compression at approximately .the pointsC. V l

"Referring now to Figs. '7 to 14, I show a structurelthat differs from the structure of Figs. 1

. to 3, primarily in that a difierent arrangement .of springs is shown. In this instance, four groups "df'ifib il .springsfl are employed, which seat upon a spring'plate 25 that is carried by the web I0 an'dthe columnsB and 9. A block 26 is disposed between the arms iii of the bolster as in the case ofFig. l, and serves not only to prevent lateral displacement of the truck frame relativeto the bolstenbut' also serves as a seat for themidportionof a semi-cll-ipticspring' 21 which assists the springs 24 in carrying the bolster load and also; serves as a snubber to prevent excessivevertical Vibrations of the bolster. The outer-Lends of the spring '2'! are supported zby'hangers "28 which are pivot'ally hung from= the truck 'frame. This arrangement'permits part of the bolster load to be transmitted to points nearer to th'e'journal boxesth-us relieving .the center portions of'the side frames ofa substantial part of theloa'd stresses.

In Figs. 15 to 1'7 Ishow anarrangement somewhat similar to that of "Figs. "7 to 9, in: that the truck frame comprises the divided bolster [5, a guide block 30 bolted between the arms 1B of the bolster and between'thecolumns Band. 9. Coil springs 31 are interposed between the lbolster arms and a spring seatingplate 32, as in the case :of Fig. .8. In this case, however, a. leaf spring 33 is provided of somewhat different form than is the spring 21. Whereas in the spring 21 the leaves aren'ormally curved, the spring 33 has its leaves or laminations'norm-ally straight before theload is applied. The spring 33 is supported from the truck frame ,by pivoted hangers 34. It serves somewhat the same purposes asthe spring 33, somewhat less effectively, but is cheaper.

I claim as my invention:

1. A railway truck comprising a pair of side frames, each having vertically-extending column elements that project at its inner and outer sides and approximately midway of its ends, a bolster having bifurcated end portions extending across the front and rear sides of the said elements, 'a block disposed between the adjacent faces of the said ei'ementsand connected to the bolster in position to retain the side frame against sidewi'se displacement, and springs for supporting the bolster on the side frames.

:2."A.railway truck comprising a pair of side frames, each having vertically-extending column elements that project at its inner and outer. sides and approximately midway of; its ends, :abolster having bifurcated end portions extending across the front and. rear sides of the said elements, .a block disposed'between theadja'c'ent faces'rof the said elements and connected between adjacent bifurcations of the .bolster in position to retain the side frame against sidewise displacement, and springs for supporting the bolsteron the side frames.

. Box-A railwayct'ruck rcomprising a pairo'f side frames each having longitudinally-extending, compression and tension elements in vertically-' frames, each having vertically-extending column elements that project at its inner and outer sides and approximately midway of its ends, a bolster having bifurcated end portions extending across frames each having longitudinally-extending compression and tension elements in verticallyspaced relation, column elements projecting at the inner and outer sides of each side frame and connected to the compression and tension elements thereof, a web carried by the tension ele-'- ment and extending forwardly and rearwardly of the column elements, a bolster having bifurcated end portions at the front and rear sides of the column elements, a block disposed between the column elements and the said portions of the bolster and connected to the bolster, springs interposed between the said portions and the said web, and a spring interposed between said block and the web.

' 5. A railway truck comprising a pair of side spaced relation, column elements projecting at the inner and outer sides of each side frame and connected to the compression and tension elements thereof, a web carried by the tension ele-,

ment and extending forwardly and rearwardly of the column elements, a bolster having bifurcated end portions at the front and rearsides of the column elements, a block disposed between the column elements and the said portions of the bolster and connected to the bolster, springs interposed between the said portions and the said web, and a laminated spring whose mid portion engages the said block and which at its ends is connected to the truck frame.

6. A railway truck comprising a pair of side frames, each having vertically-extending column elements that project at its inner and outer sides and approximately midway of its ends, a bolster having bifurcated end portions extending across the front and rear sides of the said elements, a block disposed between the adjacent faces of the said elements and connected between adjacent bifurcations oi the bolster,and bolster-supporting springs interposed between the block and the side frames.

LOUIS E. ENDSLEY. 

